4 ms·
(https://spaceweather.com/ https://spaceweather.com/) There is some good information about the relative exposure levels to cosmic radiation that one can expect
by doodlebugging 5y ago
(https://spaceweather.com/ https://spaceweather.com/)
There is some good information about the relative exposure levels to cosmic radiation that one can expect to encounter on this site. They have been doing balloon launches and measuring in-flight levels for quite a while now.